NAME

       CGI::Application::Plugin::ConfigAuto - Easy config file management for CGI::Application

SYNOPSIS

        use CGI::Application::Plugin::ConfigAuto (qw/cfg/);

       In your instance script:

        my $app = WebApp->new(PARAMS => { cfg_file => 'config.pl' });
        $app->run();

       In your application module:

        sub my_run_mode {
           my $self = shift;

           # Access a config hash key directly
           $self->cfg('field');

           # Return config as hash
           %CFG = $self->cfg;

        }

DESCRIPTION

       CGI::Application::Plugin::ConfigAuto adds easy access to config file variables to your CGI::Application
       modules.  Lazy loading is used to prevent the config file from being parsed if no configuration variables
       are accessed during the request.  In other words, the config file is not parsed until it is actually
       needed. The Config::Auto package provides the framework for this plugin.

RATIONALE

       "CGI::Application" promotes re-usable applications by moving a maximal amount of code into modules. For
       an application to be fully re-usable without code changes, it is also necessary to store configuration
       variables in a separate file.

       This plugin supports multiple config files for a single application, allowing config files to override
       each other in a particular order. This covers even complex cases, where you have a global config file,
       and second local config file which overrides a few variables.

       It is recommended that you to declare your config file locations in the instance scripts, where it will
       have minimum impact on your application. This technique is ideal when you intend to reuse your module to
       support multiple configuration files. If you have an application with multiple instance scripts which
       share a single config file, you may prefer to call the plugin from the setup() method.

DECLARING CONFIG FILE LOCATIONS

        # In your instance script
        # value can also be an arrayref of config files
        my $app = WebApp->new(PARAMS => { cfg_file => 'config.pl' })

        # OR ...

        # Pass in an array of config files, and they will be processed in order.
        $app->cfg_file('../../config/config.pl');

       Your config files should be referenced using the syntax example above. Note that the key "config_files"
       can be used as alternative to cfg_file.

       The format is detected automatically using Config::Auto. It it known to support the following formats:
       colon separated, space separated, equals separated, XML, Perl code, and Windows INI. See that modules
       documentation for complete details.

METHODS

   cfg()
        # Access a config hash key directly
        $self->cfg('field');

        # Return config as hash
        my %CFG = $self->cfg;

        # return as hashref
        my $cfg_href = $self->cfg;

       A method to access project configuration variables. The config file is parsed on the first call with a
       perl hash representation stored in memory.  Subsequent calls will use this version, rather than re-
       reading the file.

       In list context, it returns the configuration data as a hash.  In scalar context, it returns the
       configuration data as a hashref.

   config()
       "config()" in CGI::Application::Standard::Config is provided as an alias to cfg() for compliance with
       CGI::Application::Standard::Config. It always exported by default per the standard.

   std_config()
       "std_config()" in CGI::Application::Standard::Config is implemented to comply with
       CGI::Application::Standard::Config. It's for developers. Users can ignore it.

   cfg_file()
        # Usual
        $self->cfg_file('my_config_file.pl');

        # Supply the first format, guess the second
        $self->cfg_file('my_config_file.pl',{ format => 'perl' } );

       Supply an array of config files, and they will be processed in order.  If a hash reference if found it,
       will be used to supply the format for the previous file in the array.

FILE FORMAT HINTS

   Perl
       Here's a simple example of my favorite config file format: Perl.  Having the "shebang" line at the top
       helps "Config::Auto" to identify it as a Perl file. Also, be sure that your last statement returns a hash
       reference.

           #!/usr/bin/perl

           my %CFG = ();

           # directory path name
           $CFG{DIR} = '/home/mark/www';

           # website URL
           $CFG{URL} = 'http://mark.stosberg.com/';

           \%CFG;

SEE ALSO

       CGI::Application CGI::Application::Plugin::ValidateRM CGI::Application::Plugin::DBH
       CGI::Application::Standard::Config.  perl(1)

AUTHOR

       Mark Stosberg "mark@summersault.com"

LICENSE

       Copyright (C) 2004 - 2011 Mark Stosberg "mark@summersault.com"

       This library is free software. You can modify and or distribute it under the same terms as Perl itself.